#pragma once
#include <iostream>
#include <cstdio>

namespace zhj_complier
{
	inline bool isDigit(char c)
	{
		return c>='0' && c<='9';
	}

	inline bool isLetter(char c)
	{
		return ((c>='a'&&c<='z') || (c>='A'&&c<='Z'));
	}
}
